UM2262 Rev 6
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UM2262
STM32H7 Series specificities
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Appendix I
STM32H7 Series specificities
I.1 JTAG
connection
for STM32H753 devices
shows that, when a secure memory is configured, the JTAG pins are disabled
during SBSFU execution. Connecting the STM32CubeProgrammer tool (STM32CubeProg)
is not possible. Connection becomes possible once UserApp is started (the hot plug mode
must be selected in the ST-LINK configuration panel).
There is no way to connect the STM32CubeProgrammer tool (STM32CubeProg) if the user
application cannot be executed nor started because of any potential problem during the
SBSFU application execution. To mitigate this risk, the switch
SFU_SECURE_USER_PROTECT_ENABLE is enabled only after the development phase
with the activation of the SFU_FINAL_SECURE_LOCK_ENABLE switch.
Figure 54. JTAG connection capability on STM32H753 devices
I.2
JTAG connection for STM32H7B3 devices
shows that, when a secure memory is configured, the JTAG pins are disabled
during SBSFU execution. Connecting the STM32CubeProgrammer tool (STM32CubeProg)
is not possible. Connection becomes possible once UserApp is started (the hot plug mode
must be selected in the ST-LINK configuration panel) only if
SFU_DAP_PROTECT_ENABLE is deactivated.
To mitigate this risk, the switch SFU_SECURE_USER_PROTECT_ENABLE is enabled only
after the development phase with the activation of the
SFU_FINAL_SECURE_LOCK_ENABLE switch.